Calculating machine



H. E. ENpERs CALCULATING MACHINE March 7, 1939.

Filed March 26, 1938 INVENTOR H 0 Enders \fi L/fl ATTORNEY Patented Mar. 7, 1939 UNITED STATES PATENT OFFICE CALCULATING MACHINE Application March 26, 1938, Serial No. 198,221

1 Claim.- (01. 235-79) The invention has relation to calculating machines and more particularly to means for registering decimal products in accordance with the nearest full cent value.

The invention consists in the novel construction and combination of parts, as set forth in the appended claim.

In the accompanying drawing, illustrating the invention: 1

Fig. 1 is a vertical section taken through the register carriage of a calculating machine equipped with the present invention.

Fig. 2 is a fragmentary plan view of'the carriage, with parts broken away.

Fig. 3 is a detail face view of the mutilated gear.

Fig. 4 is a similar view of the stop arm and five toothed gear.

Fig. 5 is a similar view of the shouldered plate.

The invention is intended primarily for use in calculating machines constructed in accordancewith the disclosure of U. S. Patent No. 1,964,211, issued to Austin A. Overbury on June 26, 1934, and shows means whereby a full cent mechanism such as that shown in U. S. Patent No. 1,860,490, issued to Edwin F. Britten, Jr., on May 31, 1932, may be employed in a multiplying machine of the character shown in the first named patent, without loss of registering capacity in the machine. Full cent registration is commonly provided for by setting the mills dial of the product register five steps ahead so that if this dial receives a registration of five or more during the calculating operation the usual tens carry mechanism will operate to register 1 on the "cents dial.

Referring to the drawing, numeral 2 represents the transversely shiftable register carriage of a calculating machine, in which are mounted shafts 84, 86 supporting a series of multiplier dials 85 and a series of product dials l3, respectively. Products to be registered in'the dials l3 are entered therein through intermediate gears 12, mounted in the base ofthe machine and driven by the differential actuators of the calculating machine, these gears meshing with a train of intermediate gears l4 mounted in a rocking frame I5 supported upon a product dial shaft 86..

When the carriage 2 is to be shifted, or when either set of dials is to be cleared to zero regisbe in position to be set for full cent registration as hereinafter described.

According to the present invention a spring operated five toothed segment is employed to register 5 on the mills wheel of the product register, the parts being put under spring tension when the multiplier dials 85 are cleared to zero registering position, and the segment released and allowed to register when the carriage 2 comes into a given transversely shifted position.

The multiplier dials 85 are cleared by means of a hand crank on the end of the carriage, having gearing connection with a shaft 84, so that rotation of the crank will rotate shaft 84 and the dials 85 frictionally carried thereon, until pins 90 of the dials engage stops 89 which have been swung into their paths of movement. This rotation of shaft 84 serves to tension the full cent means as follows:

A mutilated gear .18, fast upon shaft 84, is capable of meshing with a mutilated gear 1|, loosely mounted on a supporting shaft I2. Shaft 12 also supports a sleeve 13, provided at one end with a shouldered plate 14. Studs on gear 1| and plate 14 are engaged by the two ends of a 5 spring 15, which thus serves to couple these two parts yieldably together. Sleeve 13 is also provided with an arm 16, having a stud mounted therein, and adapted to cooperate with the shoulder 11 of a latch 18, loosely mounted on shaft 84. Sleeve I3 is also provided with a five toothed segment "I9, adapted to mesh with the gear H of the mills dial when the parts are in the position illustrated in Fig. 1. Fast on shaft 84 is a toothed arm 80, adapted during the rotation of said shaft to engage the shoulder of plate '14 and to rotate sleeve 13 and gear H, to bring one of the teeth of said gear into meshing position with the teeth of gear 10.

Continued rotation of shaft 84 will now further 40 rotate gear II and sleeve 13, until the stud of arm 16 engages shoulder'l'l of latch II, whereupon rotation of sleeve 13 will be stopped and, gear H continuing to rotate, spring 15 will be tensioned. A back stop pawl 8| acts on the teeth of gear H to hold the spring under tension. The non-toothed portion of gear H now being opposite gear III, the former gear will remain as set until the even cent operation has been completed, since plate 14 has now been rotated out of the path of movement of the tooth of arm 88. As the register carriage is moved into a given position (for instance into the second or third place to the right of its extreme left hand shifted position), the depending end of latch 18 will to, the sequence of operations will be as follows:

strike a cam projection 82 mounted in the stud of arm it will escape from extension at, bringing the parts back to their original position. In applying this invention to the machine disc closed in Patent 1, 964,211, hereinbefore referred The multiplier is' registered on a certain number of the dials 83 at the extreme right. handof the series, and the carriage is shifted to the right,

carrying these dials out of register with th ekey-' board mechanism. The multiplier dials 85 are now cleared to zero registering position, tensioning the full cent spring 75 as above noted. The multiplicant, 'set on the keyboard, is now added into the dials i3 repeatedly, and the left hand dial it showing the multiplier is moved step by step back to zero registering position by a counting finger, whereupon the carriage is shiftedone step to the left and the process repeated with the next figure of the multiplier. When the carriage is shifted out of its units of cents registering position, in order to register the final decimals of the product, latch 78 will strike cam projection 82, and 5 will be set in the mills dial as aboveset forth. It is to be noted that the five toothed gear 89 may be located opposite any dial it in which it is desired to register the mills. According to the method of multiplication above described, it will be evident that certain of the dials it may first be used to register a multiplier, and that these same dials may later during the multiplying operation, be used to register a product. The present full cent means allows for this by delaying the registering of 5 in the mills dial until the carriage is so far shifted toward the left that the multiplier has been cleared therefrom. It may also be noted that in case a constant multiplier is desired, such a constant may be set in the dials, according to the disclosure of U. S. Patent No. 1,995,434, issued to Austin A. Overbury on'March 26, 1935, there being nothing in the present mechanism to interfere with the locating of the dials is either at zero or according to a constant by means of their clearing mechanism.

I claim:

In a calculating machine; the combination with a transversely shiftable carriage, a set of product dials mounted thereon, a set of multiplier dials, and means for clearing said multiplier dials to zero registering position; of means for automatically setting a value in one of said product dials, including a gear segment, an operating spring therefor, a latch adapted to hold said segment against the tension of its spring, means operable by the multiplier dial clearing means to tension said segment spring, and a fixedly mounted projection engageable by said latch during the shift- "ing of, said carriage, to release the segment.

HUGO E. ENDERS. 

